Stimulation of cerebral acetylcholinesterase activity by calcitonin: a possible mediation by 5-hydroxytryptamine.

The stimulatory effect of calcitonin on cerebral acetylcholinesterase activity could not be observed in rats pretreated with p-chlorophenylalanine. The results suggest that the response of the enzyme activity to calcitonin is 5-hydroxytryptamine-mediated.